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Host Plants

Flower name confirmed
Flower name Likely

Box Elder

Acer negundo

Red Alder

Alnus rubra

Russet Buffaloberry

Shepherdia canadensis

Vine Maple

Acer circinatum

Rocky Mountain Maple

Acer glabrum

Rocky Mountain Maple

Acer glabrum var. diffusum

Mountain Maple

Acer glabrum var. glabrum

Big Leaf Maple

Acer macrophyllum

Gray Alder

Alnus incana

Mountain Alder

Alnus incana ssp. tenuifolia

White Alder

Alnus rhombifolia

Water Birch

Betula occidentalis

Brown Dogwood

Cornus glabrata

Pacific Dogwood

Cornus nuttallii

Red Osier Dogwood

Cornus sericea

Western Dogwood

Cornus sericea ssp. occidentalis

Creek Dogwood

Cornus sericea ssp. sericea

Beaked Hazelnut

Corylus cornuta

California Hazel

Corylus cornuta ssp. californica

Crataegus castlegarensis

Black Hawthorn

Crataegus douglasii

California Ash

Fraxinus dipetala

Oregon Ash

Fraxinus latifolia

Velvet Ash

Fraxinus velutina

Ocean Spray

Holodiscus discolor

Holodiscus discolor var. discolor

Desert Ocean Spray

Holodiscus discolor var. glabrescens

Little Leaf Creambush

Holodiscus discolor var. microphyllus

Desert Peach

Prunus andersonii

Bitter Cherry

Prunus emarginata

Desert Range Almond

Prunus fasciculata

Prunus fasciculata var. fasciculata

Desert Apricot

Prunus fremontii

Hollyleaf Cherry

Prunus ilicifolia

Hollyleaf Cherry

Prunus ilicifolia ssp. ilicifolia

Klamath Plum

Prunus subcordata

Chokecherry

Prunus virginiana

Western Chokecherry

Prunus virginiana var. demissa

Coast Live Oak

Quercus agrifolia

Coast Live Oak

Quercus agrifolia var. agrifolia

Coastal Live Oak

Quercus agrifolia var. oxyadenia

Scrub Oak

Quercus berberidifolia

Canyon Live Oak

Quercus chrysolepis

Muller Oak

Quercus cornelius-mulleri

Blue Oak

Quercus douglasii

Nuttall's Scrub Oak

Quercus dumosa

Leather Oak

Quercus durata

Leather Oak

Quercus durata var. durata

San Gabriel Oak

Quercus durata var. gabrielensis

Engelmann Oak

Quercus engelmannii

Garry's Oak

Quercus garryana

Oregon White Oak

Quercus garryana var. garryana

Tucker's Oak

Quercus john-tuckeri

Black Oak

Quercus kelloggii

Valley Oak

Quercus lobata

Desert Oak

Quercus palmeri

Santa Cruz Island Oak

Quercus parvula

Shreve Oak

Quercus parvula var. shrevei

Tamalpais Oak

Quercus parvula var. tamalpaisensis

Grey Oak

Quercus turbinella

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